Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d2fe77f647244f…

MALICIOUS

PDF

79.9 KB Created: 2021-09-03 09:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9d024519743502aef1e1dd5f9d56119b SHA-1: 72d4cd27118ec87d0ed166d99f26cd1b1c511425 SHA-256: d2d2fe77f647244ffde7f16f45b35482942c1b52a582c21f3ce38c1c00efee2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://zjpjxt.cn/upload/uploadfile/file/rizelada.pdf In PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/n3krsfvc3vc8r1anc8quh5fef7/gelixuruloferawakomub.pdfIn PDF document text
    • http://livestocktool.com/d/files/49864812401.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/67f84bb47882199c3bb3cf1bbab82f21/wepanur.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/33519335831.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210528_19FD23FBFD80D25F.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/11688608085.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/74028293280.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/32726891282.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210613200749_zg7o9g.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/81711832224.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/96501789549.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/89941096504.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/tukupozofikotudonol.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/wuvebup.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/51104010634.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/60005433004.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa53ea088---66309860053.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084484bafeef---kufupikelatum.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/77780166731.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5bf6155ef5702f568045aa75a0aae177/74220967042.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c2d0159a5---jotigafanuvisokifudab.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16124376e493e1---68585086925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=bx8+bus+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BA 18020 bytes
SHA-256: 61be64352a3261aced3a4b826d44a72af10205ecfd1dc476f190775041fdb720
font_01_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 10240 bytes
SHA-256: c6139ea21e09a6ed08078e263c606f1d097751c8fc50b5141eba1fef48c17f78
font_02_sfnt_off00011a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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